Other

Kira Alexandrovna Mager

Vasily Vladimirovich Korshak

Antonina Mikhailovna Polyakova

Maria D Suchkova

Vyacheslav Nikolaevich Semyantsev

An adhesive composition based on a monomeric ester of .alpha.-cyanacrylic acid and a modifying agent, viz. a monomeric fluorinated ether of dimethylvinylethynylcarbinol of the formula: ##STR1## wherein R is CH.sub.2 (CF.sub.2).sub.n H or CH.sub.2 (CF.sub.2).sub.n CF.sub.3 ; n=2 to 10. Owing to the addition of a monomeric fluorinated ether of dimethylvinylethynylcarbinol as a modifying agent into the adhesive composition, mechanical strength and water-resistant of the adhesive bond are improved. Thus, an ultimate shear strength of the adhesive bond produced from the adhesive composition according to the present invention after keeping in water for 10 days is equal to 119-185 kgf/cm.sup.2.

Adhesive composition

An adhesive composition containing monomeric .alpha.-cyan acrylates - alkyl -.alpha.-cyan acrylates having from 1 to 7 carbon atoms, and/or allyl-.alpha.-cyan acrylate, as well as a modifying additive comprising fluorinated methacrylate or fluorinated acrylate of the general formula ##STR1## wherein n=1-3, R is H, CH.sub.3, or CH.sub.2 --C-- COOH.sub.2 (CF.sub.2)n.sub.1 CF.sub.3, wherein n.sub.1 =1-2 and R has the abovementioned significances. Monomeric .alpha.-cyan acrylates are used in an amount of 70-90 w.% and the modifying additive in an amount of 10-30 w.%. A strength of adhesive bond obtained using the adhesive compositions according to the invention attains 180-190 kp/cm.sup.2. The adhesive bond exhibits a considerable flexibility and hydrolytic stability.

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Moscow, Russia

Kira Alexandrovna Mager